Flue-thimble.



PATENTED AUG. 18, 1908.

J. L. DROESCH. FLUE THIMBLE.

APPLICATION FILED APR. 10, 1908.

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JOHN L. DROESGH, OF BELLEVILLE, ILLINOIS.

FLUE-THIMB LE Specification of Letters Patent.

Patented Aug. 18, 1908.

Application filed April 10, 1908. Serial No. 426,351.

To all whom it may concern:

Be it known that I, JOHN L. DROESCH, a citizen of the United States, residing at Belleville, in the county of St. Clair and State of Illinois, have invented new and useful Improvements in Flue-Thimbles, of which the following is a specification.

This invention is an improved reducer flue thimble for enabling a stove pipe to be fitted in a flue crock of a diameter larger than necessary to receive the stove pipe and the said invention consists in the construction, combination and arrangement of devices hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a sectional view of a flue thimble constructed in accordance with my invention, showing the same in use in the crock of a chimney or flue and showing a stove pipe in said thimble. Fig. 2 is a detail perspective view of the outer head of the thimble. Fig. 3 is a similar view of the inner head thereof. Fig. 4 is a transverse sectional view of the thimble, the crock and the stove pipe. Fig. 5 is a detail perspective view of the frusto-conical sleeve of the thimble.

In-Fig. 1 of the drawings, a flue or chimney is indicated at a and provided with a crock b of usual form. My improved thimble comprises an outer head 1, an inner head 2 and a frusto-conical sleeve or body portion 3. The head 1 is preferably circular in form, is of suitable size to cover the outer end of the crock and is provided with a central opening 4 of the required diameter to enable a stove pipe 0 to be snugly fitted therein. Said outer sad is provided on its inner side with an annular flange 5, the exterior diameter of which is nearly equal to the interior diameter of the crock. A pair, or any suitable number of spring arms 6 are secured at their outer ends to the inner side of the outer head, just without the opening 4 and normally converging inwardly or toward the flue. These spring arms when the stove pipe is inserted through the opening 4 of the outer head bear against the stove pipe at suitable points and serve to retain the stove pipe in place as shown in Fig. 1 and in Fig. 4:.

The inner head 2 is circular in form and is of such size as to enable it to fit snugly within the crock. Said inner head has an opening 7 in its center, the diameter of which is less than the internal diameter of the stove pipe so that the inner head forms a stop for the inner end of the stove pipe and the latter is prevented from being pushed too far within the flue, as is clearly indicated in Fig. 1.

On the inner side of the inner cap and around the opening 7 thereof is a circular.

flange 8 against which the inner end of the stove pipe abuts. A pair or any suitable number of spring arms 9 which normally diverge toward their front or outer ends have their rear or inner ends secured to the inner side of the inner head 2- at points without the flange 8.

The frusto-conical sleeve 3 is equal in eX- terior diameter at its larger, front end, to the interior diameter of the crock b and is placed therein and between the said crock and the flange 5 of the outer head 1. The smaller rear end of said sleeve is of such diameter internally as to enable it to fit on and around the flange 8 of the inner head 2. The spring arms 9 of the said inner head extend between said sleeve and the crock and bear against the inner surface of the latter and hence serve to securely hold the inner head of the thimble in place while ermitting said inner head of the thimble to be readily drawn out from the crock. The outer and inner heads 1, 2 are connected together by bolt rods or other suitable devices such as indicated at 10 in Fig. 4, such bolt rods passing through openings 11, 12 with which the outer and in ner heads 1, 2 are respectively provided.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is:

1. A reducer flue thimble comprising an outer head of a diameter sufficient to cause it to cover the outer end of a crock or stove pipe hole, having a flange on its inner side and further provided on its inner side with spring arms to bear against a stove pipe and secure the latter in said outer head, an inner head of less diameter than the outer head to enable it to fit in said crock or stove pipe hole and provided on its inner side with a flange of less diameter than that of the outer head, said inner head being further provided on its inner side with spring arms to engage the inner surface of the crock, and a sleeve tapering toward its inner end, having its outer end bearing on the flange of the outer head and its inner, smaller end bearing against the flange of the inner head.

2. A reducer flue thimble comprising an outer head of a diameter sufficient to cause it to cover the outer end of a crock or stove pipe hole, said outer head having a flange on its inner side and further provided With flanges thereof and boltrodsconneeting said 10 spring arms to bear against a stove pipe and heads together and securing them on the secure the latter in the outer head, an inner ends-of said sleeve.

head of less diameter to enable it to fit in In testimony whereof I afliX my signature said crock or stove pipe hole, said inner head in presence of two Witnesses.

having a flange on its inner side and further provided With spring arms to bear against the inner surface of the crock, a sleeve connecting said heads and bearing against the JOHN L. DROESOH. Witnesses:

JOHN P. HOFFMANN, WILLIE H. SCHERER. 

